(19)
(11) EP 0 268 319 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.05.1989 Bulletin 1989/21

(43) Date of publication A2:
25.05.1988 Bulletin 1988/21

(21) Application number: 87202092.0

(22) Date of filing: 30.10.1987
(51) International Patent Classification (IPC)4: C25B 1/00, C25C 1/10
(84) Designated Contracting States:
CH DE ES FR GB GR LI SE

(30) Priority: 11.11.1986 IT 2228786

(71) Applicant: NUOVA SAMIM S.p.A.
I-20153 Milan (IT)

(72) Inventors:
  • Guerriero, Renato
    I-30170 Mestre Venice (IT)
  • Vittadini, Italo
    I-30170 Mestre Venice (IT)

(74) Representative: Roggero, Sergio (IT) et al
Ing. Barzanò & Zanardo S.p.A. Via Borgonuovo 10
I-20121 Milano
I-20121 Milano (IT)


(56) References cited: : 
   
       


    (54) Method for extracting Mn metal and manganese dioxide from divalent Mn salt solutions


    (57) The invention relates to the simultaneous obtention of elemental Mn and Mn dioxide(gamma) starting from manganese sulphate solutions by electrolysis of same in a cell split by an anionic diaphragm into an anodic and a cathodic compartment.





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